Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A user apparatus that performs D2D communication by radio, comprising: a signal reception unit configured to detect a signal addressed to the user apparatus by detecting an identifier, of a physical layer of the user apparatus, that is associated with an identifier of an upper layer of the user apparatus from a signal received by radio, wherein the signal reception unit detects data of the upper layer addressed to the user apparatus by using the identifier of the physical layer of the user apparatus as a part of the identifier of the upper layer of the user apparatus.
This invention relates to device-to-device (D2D) communication systems, specifically addressing the challenge of efficiently identifying and processing signals in direct radio communication between devices. The user apparatus includes a signal reception unit designed to detect signals specifically addressed to it by identifying a physical layer identifier associated with an upper layer identifier. The physical layer identifier is used as part of the upper layer identifier to filter and extract relevant upper layer data from received radio signals. This approach improves signal detection accuracy and reduces processing overhead by leveraging the physical layer identifier to streamline the identification of upper layer data. The system ensures that only signals intended for the user apparatus are processed, enhancing efficiency in D2D communication environments. The invention is particularly useful in scenarios where devices communicate directly without relying on a central network infrastructure, such as in ad-hoc networks or proximity-based services.
2. A user apparatus that performs D2D communication by radio, comprising: a signal transmission unit configured to transmit a signal including a destination identifier of a physical layer associated with a destination identifier of an upper layer, wherein the destination identifier of the physical layer included in the signal transmitted by the signal transmission unit includes information of a part of the destination identifier of the upper layer.
This invention relates to device-to-device (D2D) communication systems, specifically addressing the challenge of efficiently identifying destination devices in wireless networks. The user apparatus performs D2D communication via radio signals, where a signal transmission unit sends a signal containing a physical layer destination identifier linked to an upper layer destination identifier. The physical layer identifier includes only a portion of the upper layer identifier, reducing the overhead of transmitting full identifiers while maintaining accurate routing. This partial inclusion allows for efficient addressing in D2D networks, where devices may dynamically connect without relying on centralized infrastructure. The system ensures compatibility between different protocol layers by associating the truncated physical layer identifier with the complete upper layer identifier, enabling seamless communication. The approach optimizes bandwidth usage and reduces signaling complexity, particularly in dense networks where frequent D2D connections occur. The invention improves communication efficiency by minimizing redundant data transmission while preserving the ability to uniquely identify destination devices across protocol layers.
3. A signal reception method executed by a user apparatus that performs D2D communication by radio, comprising: a signal reception step of detecting a signal addressed to the user apparatus by detecting an identifier, of a physical layer of the user apparatus, that is associated with an identifier of an upper layer of the user apparatus from a signal received by radio, wherein, in the signal reception step, the user apparatus detects data of the upper layer addressed to the user apparatus by using the identifier of the physical layer of the user apparatus as a part of the identifier of the upper layer of the user apparatus.
This invention relates to device-to-device (D2D) communication systems, specifically improving signal reception efficiency by leveraging physical and upper layer identifiers. The problem addressed is the inefficiency in detecting signals in D2D communication, where devices must quickly and accurately identify relevant data amid multiple transmissions. The method involves a user apparatus performing D2D communication via radio signals. The apparatus detects signals addressed to it by identifying an identifier from the physical layer that is linked to an upper layer identifier. During signal reception, the apparatus uses the physical layer identifier as part of the upper layer identifier to extract data specifically intended for it. This approach reduces processing overhead by narrowing down relevant data early in the reception process, improving communication reliability and speed in D2D networks. The technique ensures that only signals containing the correct physical layer identifier are further processed for upper layer data, minimizing unnecessary decoding of irrelevant transmissions. This is particularly useful in dense D2D environments where multiple devices communicate simultaneously. The method enhances signal detection accuracy and reduces power consumption by avoiding unnecessary processing of non-relevant data.
4. A signal transmission method executed by a user apparatus that performs D2D communication by radio, comprising: a signal transmission unit step of transmitting a signal including a destination identifier of a physical layer associated with a destination identifier of an upper layer, wherein the destination identifier of the physical layer included in the signal transmitted by the signal transmission step includes information of a part of the destination identifier of the upper layer.
This invention relates to device-to-device (D2D) communication systems, specifically addressing the challenge of efficiently transmitting signals between devices while minimizing overhead. In D2D communication, devices communicate directly without relying on a central network infrastructure, which requires efficient signaling to identify destinations. The invention provides a method for transmitting signals where a user apparatus includes a destination identifier of the physical layer that is derived from a portion of the destination identifier of an upper layer. This approach reduces the size of the physical layer identifier while maintaining the ability to uniquely identify the intended recipient. The signal transmission process involves encoding a signal with this partial upper-layer identifier, allowing devices to decode and route the signal correctly. By using only a portion of the upper-layer identifier, the method minimizes the overhead associated with physical-layer signaling while ensuring accurate destination identification. This technique is particularly useful in scenarios where bandwidth is limited or where reducing signaling overhead is critical for performance. The invention improves communication efficiency in D2D networks by optimizing identifier transmission without compromising reliability.
5. A user apparatus that performs D2D communication by radio, comprising: a signal transmission unit configured to transmit a signal including a source identifier of a physical layer associated with a source identifier of an upper layer, wherein the signal transmission unit generates the source identifier of the physical layer by applying a hash function to the source identifier of the upper layer, maps the source identifier of the physical layer to a reference signal, and transmits the reference signal.
This invention relates to device-to-device (D2D) communication systems, specifically addressing the need for efficient and secure identification of communicating devices at both the physical and upper layers. The system involves a user apparatus equipped with a signal transmission unit that generates and transmits a signal containing a source identifier. The source identifier at the physical layer is derived from a source identifier at an upper layer by applying a hash function, ensuring a compact and secure representation. This physical-layer identifier is then mapped to a reference signal, which is transmitted to facilitate D2D communication. The reference signal serves as a carrier for the identifier, enabling receiving devices to decode and verify the source's identity. The use of a hash function ensures that the physical-layer identifier is unique and resistant to tampering, while the mapping to a reference signal optimizes transmission efficiency. This approach enhances security and reliability in D2D communication by linking identifiers across layers while minimizing overhead. The system is particularly useful in scenarios requiring low-latency, high-security D2D interactions, such as emergency networks or autonomous vehicle coordination.
6. A user apparatus that performs D2D communication by radio, comprising: a signal transmission unit configured to transmit a signal including an identifier of a physical layer associated with an identifier of an upper layer, wherein the signal transmission unit generates the identifier of the physical layer by applying a hash function to the identifier of the upper layer, maps the identifier of the physical layer to a reference signal, and transmits the reference signal.
This invention relates to device-to-device (D2D) communication systems, specifically addressing the challenge of efficiently identifying and managing communication links between devices in a wireless network. The invention provides a user apparatus that facilitates D2D communication by transmitting a signal containing an identifier of a physical layer associated with an identifier of an upper layer. The apparatus includes a signal transmission unit that generates the physical layer identifier by applying a hash function to the upper layer identifier. This generated physical layer identifier is then mapped to a reference signal, which is transmitted to enable reliable and efficient D2D communication. The use of a hash function ensures that the physical layer identifier is derived in a deterministic yet secure manner, reducing the risk of conflicts while maintaining low computational overhead. The reference signal, which carries the mapped physical layer identifier, allows receiving devices to quickly and accurately identify the transmitting device and establish communication. This approach enhances the scalability and robustness of D2D networks by simplifying the identification process and reducing the need for centralized coordination. The invention is particularly useful in scenarios where devices need to communicate directly without relying on a central infrastructure, such as in emergency response networks or ad-hoc wireless systems.
7. A signal transmission method executed by a user apparatus that performs D2D communication by radio, comprising: a signal transmission step of transmitting a signal including an identifier of a physical layer associated with an identifier of an upper layer, wherein, in the signal transmission step, the user apparatus generates the identifier of the physical layer by applying a hash function to the identifier of the upper layer, maps the identifier of the physical layer to a reference signal, and transmits the reference signal.
This invention relates to device-to-device (D2D) communication systems, specifically addressing the challenge of efficiently transmitting signals while ensuring proper identification and synchronization between devices. The method involves a user apparatus generating and transmitting a signal that includes an identifier of the physical layer, which is derived from an upper-layer identifier. The user apparatus applies a hash function to the upper-layer identifier to produce the physical-layer identifier, ensuring a deterministic and collision-resistant mapping. This physical-layer identifier is then mapped to a reference signal, which is transmitted to other devices in the D2D network. The reference signal serves as a synchronization and identification mechanism, allowing receiving devices to correlate the physical-layer identifier with the corresponding upper-layer identifier. This approach enhances signal transmission efficiency by reducing overhead while maintaining reliable device identification and synchronization in D2D communication environments. The method is particularly useful in scenarios where devices dynamically join or leave the network, requiring robust and scalable identification mechanisms.
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June 23, 2020
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